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<head><meta charset="utf-8"><title>I-prioritize #71359 Regression in usable type complexity: ov · t-compiler/wg-prioritization · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/index.html">t-compiler/wg-prioritization</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html">I-prioritize #71359 Regression in usable type complexity: ov</a></h3>

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<a name="194702193"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194702193" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194702193">(Apr 20 2020 at 16:44)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> issue <a href="https://github.com/rust-lang/rust/issues/71359" title="https://github.com/rust-lang/rust/issues/71359">#71359</a> has been requested for prioritization.</p>



<a name="194703707"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194703707" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jonas Schievink  [he/him] <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194703707">(Apr 20 2020 at 16:55)</a>:</h4>
<p>This might be expected fallout, but it's good to check. Can users set the recursion limit to get around this?</p>



<a name="194707261"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194707261" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194707261">(Apr 20 2020 at 17:25)</a>:</h4>
<p>Having a backtrace for the error would be helpful</p>



<a name="194707399"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194707399" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194707399">(Apr 20 2020 at 17:26)</a>:</h4>
<p>Apparently,</p>
<blockquote>
<p>(Running with RUST_BACKTRACE does not change the output.)</p>
</blockquote>



<a name="194708919"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194708919" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194708919">(Apr 20 2020 at 17:40)</a>:</h4>
<p>If we run with <code>-Ztreat-err-as-bug</code>, we should get a backtrace where that error is being generated.</p>



<a name="194710268"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194710268" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194710268">(Apr 20 2020 at 17:51)</a>:</h4>
<p>Ah, ok</p>



<a name="194823789"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194823789" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194823789">(Apr 21 2020 at 16:00)</a>:</h4>
<p><span class="user-mention" data-user-id="125250">@Wesley Wiser</span> I tried to run:</p>
<div class="codehilite"><pre><span></span><span class="nv">RUST_BACKTRACE</span><span class="o">=</span><span class="m">1</span> cargo +nightly rustc -- -Ztreat-err-as-bug
</pre></div>


<p>But it didn't ICE, so I have no backtrace</p>



<a name="194823819"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194823819" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194823819">(Apr 21 2020 at 16:00)</a>:</h4>
<p>Any reason why?</p>



<a name="194857204"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194857204" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194857204">(Apr 21 2020 at 20:29)</a>:</h4>
<p>Huh, I've never seen <code>treat-err-as-bug</code> not work...</p>



<a name="194857349"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194857349" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194857349">(Apr 21 2020 at 20:30)</a>:</h4>
<p>this is a bit surprising to me too this is not showing any pointer to what's going on</p>



<a name="194857448"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194857448" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194857448">(Apr 21 2020 at 20:31)</a>:</h4>
<p>If it's related to <a href="https://github.com/rust-lang/rust/issues/32498" title="https://github.com/rust-lang/rust/issues/32498">#32498</a> as the author mentions, I suspect the error is coming from the codegen backend which might not respect <code>treat-err-as-bug</code></p>



<a name="194858273"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194858273" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194858273">(Apr 21 2020 at 20:38)</a>:</h4>
<p>I guess it may be nice to see what happens if we revert <a href="https://github.com/rust-lang/rust/issues/70896" title="https://github.com/rust-lang/rust/issues/70896">#70896</a></p>



<a name="194858284"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194858284" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194858284">(Apr 21 2020 at 20:38)</a>:</h4>
<p>just in case and maybe ping <span class="user-mention" data-user-id="138448">@cuviper</span></p>



<a name="194858583"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194858583" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194858583">(Apr 21 2020 at 20:41)</a>:</h4>
<p>this is the last unprioritized one :)</p>



<a name="194862627"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862627" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862627">(Apr 21 2020 at 21:14)</a>:</h4>
<p>I think there may be a standing policy for this kind of issue</p>



<a name="194862721"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862721" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862721">(Apr 21 2020 at 21:15)</a>:</h4>
<p><span class="user-mention" data-user-id="125250">@Wesley Wiser</span> what do you mean?</p>



<a name="194862742"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862742" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862742">(Apr 21 2020 at 21:15)</a>:</h4>
<p>I feel like I've seen this kind of issue before</p>



<a name="194862805"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862805" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862805">(Apr 21 2020 at 21:16)</a>:</h4>
<p>And I feel like this maybe just be acceptable breakage</p>



<a name="194862835"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862835" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862835">(Apr 21 2020 at 21:16)</a>:</h4>
<p>Sort of in the same vein as the macro recursion limit stuff</p>



<a name="194862883"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862883" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862883">(Apr 21 2020 at 21:16)</a>:</h4>
<p>I see, maybe it's good to nominate it?</p>



<a name="194862982"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194862982" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194862982">(Apr 21 2020 at 21:17)</a>:</h4>
<p>Maybe <span class="user-mention" data-user-id="116083">@pnkfelix</span> has an opinion?</p>



<a name="194863047"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194863047" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194863047">(Apr 21 2020 at 21:18)</a>:</h4>
<p>TLDR: a recently nightly caused a crate to start breaking during codegen with type length limit exceeded errors</p>



<a name="194868208"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194868208" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194868208">(Apr 21 2020 at 22:10)</a>:</h4>
<p>hmm</p>



<a name="194868243"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194868243" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194868243">(Apr 21 2020 at 22:11)</a>:</h4>
<p>maybe P-medium but nominate for discussion...</p>



<a name="194916757"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194916757" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194916757">(Apr 22 2020 at 11:28)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> do you want to nominate it to just discuss this particular issue or what <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> have said, that we need a policy for this kind of issues?</p>



<a name="194916923"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194916923" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194916923">(Apr 22 2020 at 11:30)</a>:</h4>
<p>Issue <a href="https://github.com/rust-lang/rust/issues/71359" title="https://github.com/rust-lang/rust/issues/71359">#71359</a>'s prioritization request has been removed.</p>



<a name="194926530"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194926530" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Wesley Wiser <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194926530">(Apr 22 2020 at 13:04)</a>:</h4>
<p>I think it's probably worth having a small discussion in the meeting about this</p>



<a name="194944296"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194944296" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> pnkfelix <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194944296">(Apr 22 2020 at 15:01)</a>:</h4>
<p><span class="user-mention silent" data-user-id="116266">Santiago Pastorino</span> <a href="#narrow/stream/227806-t-compiler.2Fwg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov/near/194916757" title="#narrow/stream/227806-t-compiler.2Fwg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov/near/194916757">said</a>:</p>
<blockquote>
<p><span class="user-mention silent" data-user-id="116083">pnkfelix</span> do you want to nominate it to just discuss this particular issue or what <span class="user-mention silent" data-user-id="125250">Wesley Wiser</span> have said, that we need a policy for this kind of issues?</p>
</blockquote>
<p>Maybe both. At first my intent with my nomination suggestion was for more of a "announcement, we prioritized this as P-medium but it may be of general interest/concern. But now I am also thinking that <span class="user-mention" data-user-id="125250">@Wesley Wiser</span> is making a good point that we should discuss what the policy is for cases like this. We don't think we want instances of this problem to just gradually accumulate...</p>



<a name="194948685"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/194948685" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Santiago Pastorino <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#194948685">(Apr 22 2020 at 15:32)</a>:</h4>
<p><span class="user-mention" data-user-id="116083">@pnkfelix</span> <span aria-label="love" class="emoji emoji-2764" role="img" title="love">:love:</span></p>



<a name="195974718"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/195974718" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#195974718">(May 01 2020 at 15:50)</a>:</h4>
<p>From what I've seen in the Crater report, 6 crates broke because of this</p>



<a name="195977971"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize%20%2371359%20Regression%20in%20usable%20type%20complexity%3A%20ov/near/195977971" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/I-prioritize.20.2371359.20Regression.20in.20usable.20type.20complexity.3A.20ov.html#195977971">(May 01 2020 at 16:20)</a>:</h4>
<p>There's nothing particularly worrying IMHO</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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